package wli.java.security.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5Encryption {
	private static String convertedToHex(byte[] data) {
		StringBuffer buf = new StringBuffer();

		for (int i = 0; i < data.length; i++) {
			int halfOfByte = (data[i] >>> 4) & 0x0F;
			int twoHalfBytes = 0;

			do {
				if ((0 <= halfOfByte) && (halfOfByte <= 9)) {
					buf.append((char) ('0' + halfOfByte));
				}

				else {
					buf.append((char) ('a' + (halfOfByte - 10)));
				}

				halfOfByte = data[i] & 0x0F;

			} while (twoHalfBytes++ < 1);
		}
		//System.out.println("buf========"+buf);
		return buf.toString();
	}

	public static String MD5(String text) throws NoSuchAlgorithmException,
			UnsupportedEncodingException {
		MessageDigest md;
		md = MessageDigest.getInstance("MD5");
		byte[] md5 = new byte[64];
		md.update(text.getBytes("iso-8859-1"), 0, text.length());
		md5 = md.digest();
		//System.out.println("md5========"+md5);
		return convertedToHex(md5);
	}
}
